Local Buffer Overflow in SIPp 3.6 and Earlier Versions by SIPp
CVE-2018-25356

8.6HIGH

Key Information:

Vendor

Sipp

Status
Sipp
Vendor
CVE Published:
23 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-25356?

SIPp, a popular open-source tool for testing SIP (Session Initiation Protocol) applications, is susceptible to a local buffer overflow vulnerability in versions 3.6 and earlier. This flaw arises from improper handling of command-line arguments, specifically the -3pcc, -i, or -log_file parameters. By providing oversized input, an attacker can cause the application to write beyond allocated memory boundaries, potentially leading to application crashes or the execution of arbitrary code. This vulnerability underscores the importance of input validation and careful management of memory in software development.

Affected Version(s)

SIPp 0 <= 3.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-25356 - Proof of Concept

References

https://www.exploit-db.com/exploits/44962
exploit
http://sipp.sourceforge.net/
product
https://github.com/SIPp/sipp/releases
product

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Fakhri Zulkifli
.